The token for atm_intr is actually a void *, not an int. Clarify what atm_intr expects in a comment and de-obfuscate the code a little bit by replacing the portability macros with the native BSD names.
The token for atm_intr is actually a void *, not an int. Clarify
what atm_intr expects in a comment and de-obfuscate the code a little
bit by replacing the portability macros with the native BSD names.

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